Karim, three comments:- CPU ID needs be bigger than 8-bits, else you can only support up to 256p- Are 8-bit event IDs big enough? A comment explainig that sub-IDs should be placed within the log record would help avoid the issue of the 8-bit space disappearing too quickly- To avoid the problem of RelayFS non-reenterancy I think ltt_log_event() will need a hook at its end so that whatever mechanism was used to avoid the situation can be disabled. Thanks, Michael-- Michael A. Raymond Office: (651) 683-3434Core OS Group Real-Time System Software-To unsubscribe from this list: send the line "unsubscribe linux-kernel" inthe body of a message to majordomo@vger.kernel.orgMore majordomo info at http://vger.kernel.org/majordomo-info.htmlPlease read the FAQ at http://www.tux.org/lkml/